/**
 * @Author lzc
 * @Date 2022/4/22 9:07
 */
public class Demo2 {
    public static void main(String[] args) {
        System.out.println(1-0.9==0.1);
        System.out.println(1-0.1==0.9);
    
        System.out.println(1-0.9);
        System.out.println(1-0.1);
    
        System.out.println(1.0/0);
        System.out.println(0.0/0);
    }
}
